11613863 has 4 divisors (see below), whose sum is σ = 11690928. Its totient is φ = 11536800.

The previous prime is 11613803. The next prime is 11613911. The reversal of 11613863 is 36831611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36831611 = 1597 ⋅23063.

It is a cyclic number.

It is not a de Polignac number, because 11613863 - 2⁶ = 11613799 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11613803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38306 + ... + 38607.

It is an arithmetic number, because the mean of its divisors is an integer number (2922732).

Almost surely, 2^11613863 is an apocalyptic number.

11613863 is a deficient number, since it is larger than the sum of its proper divisors (77065).

11613863 is an equidigital number, since it uses as much as digits as its factorization.

11613863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 77064.

The product of its digits is 2592, while the sum is 29.

The square root of 11613863 is about 3407.9118239767. The cubic root of 11613863 is about 226.4603806100.

The spelling of 11613863 in words is "eleven million, six hundred thirteen thousand, eight hundred sixty-three".